Fully Automatic Dual-Channel Secondary Thermal Desorption Instrument, JX-20D (CAT#: STEM-AIAE-0545-ZJF)

The JX-20D Thermal Desorption Analyzer is a fully automatic dual-channel dual-stage (cold trap) thermal desorption instrument featuring 40 sample positions. It utilizes semiconductor cooling, with the cold trap temperature capable of reaching as low as -35°C (depending on ambient temperature). It features standard sample simulation sampling functionality. The enrichment, injection, and other processes are fully automated. It can be used in conjunction with domestic and imported gas chromatographs.

Primary Desorption Heating Range: 40℃—400℃, Temperature Control Accuracy 1℃
Injection Valve Heating Range: 40℃—240℃, Temperature Control Accuracy 1℃
Sample Transfer Tube Heating Range: 40℃—240℃, Temperature Control Accuracy 1℃
Cold Trap Cooling Range: -35℃— -5℃
Secondary Desorption Temperature Range: -35℃—450℃
Secondary Desorption Heating Rate: >70℃/s
Sample Tube Specifications: Diameter 1/4”, Length 3.5”
Sample Positions: Dual 20 positions
Enrichment Time: 0-60min
Injection Time: 0-10min
Simulated Sampling Time: 0-60min
Simulated Sampling Flow Rate: 0-200ml/min
RSD: ≤2.5% (0.05μg benzene in methanol)
Power: Peak 500W
Dimensions: 600×370×400(mm)
Net Weight: Approximately 25kg

Can accommodate 20x2 sample tubes, with automated operation, leak detection, and gas phase initiation, requiring no manual oversight.
Features multiple fault detection and handling modes, automatically stopping the machine and providing prompts in case of mechanical movement anomalies, ensuring reliable and precise operation while preventing collisions. Maintenance mode allows for easy instrument maintenance, fault diagnosis, and leak detection.
Utilizes cylinder-driven sampling needle, with low failure rate and no maintenance required.
Employ semiconductor cooling technology to save on operating costs.
Achieves a secondary analysis temperature ramp rate greater than 70°C/s, reaching up to 450°C with peak width less than 3s.
Utilizes gas lines made entirely of passivated and polished 316 stainless steel, with sealing rings made of PTFE material for high-temperature resistance and zero volatile emissions. Sample gas path employs passivated RESTEK tubing, Siltek®/Sulfinert® treated stainless steel tubing combined with stainless steel ferrules and fully heated throughout.
Integrates heating valve box and heating gas path, reducing intermediate links. Optimizes dead volume reduction by calculating the optimal diameter of the connection point between the analysis tube and the gas path, minimizing issues associated with low resolution due to dead volumes.
Includes standard sample simulation sampling functionality.
Demonstrates strong compatibility with various domestic and international gas chromatographs, facilitating easy connection and synchronization with chromatographs and workstations. Can read chromatograph ready signals and work in coordination with chromatographs.

Fully Automatic Secondary Thermal Desorption Instrument, JX-7MT
Fully Automatic Primary Thermal Desorption Instrument, JX-9AT
Fully Automatic Dual-Channel Secondary Thermal Desorption Instrument Pro, JX-20D P
Single Cold Trap Atmospheric Online Concentration Sampler, ZTD-1